Adding-machine.



A. A. HORTON.

ADDING MACHINE.

APPLICATION HLED JULY 22, 1914.

Patented June 12, 1917.

I0 SHEETS-SHEET I- ZWW A. A. HORTON.

ADDING MACHINE.

APPLICATION FILED JULY 22.1914.

1,229,461. Patented June 12, 1917.

10 SHEETS-SHE 2.

A. A. HORTON.

ADDING MACHINE. APPLICATION man JULY 22, 1914.

1,229,461. Patented J1me 12, 1917.

I0 SHEETS-SHEET 3- A. A. HORTON. ADDING MACHINE.

APPLICATION FILED JULY 22,1914.

Patented June 12, 1917.

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ADDING MACHINE.

APPLICATION FILED JULY 22, 1914.

fatemed June 12, 1917.

10 SHEETSSHEET 5.

A. A. HORTON.

ADDING MACHINE.

APPLICATION FILED JULY 22, 19M.

Patenteilune 12, 1917.

10 SHEETSSHEET 6.

51 M uautoz A. A. HORTON.

ADDING MACHINE.

APPLICATION FILED JULY 22, I914.

1,229,461 Patented June 12, 1917.

10 SHEETSSHEET 7- WMWM A. A. HORTON.

ADDING MACHINE.

APPLICATION FILED JULY 22, 1914.

1,229,461 Patented June 12, 1917.

10 SHEETS-SHEET 8.

A. A. HORTON.

ADDING MACHINE.

APPLICATION FILED JULY 22, 1914.

Patented June 12, 1917.

I0 SHEETS-SHEET 9.

lmblmcmo A. A. HORTON.

ADDING MACHINE.

APPLICATION FILED JULY 22,1914.

Patented June 12, 1917.

10 SHEETS-SHEET- 1o.

awake a UNITED STATES PATENT OFFICE.

ALLEN A. HORTON, OF DETROIT, MICHIGAN, ASSIGNOR TO BURROUGHS ADDINGMACHINE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

ADDING-MACHIN E.

Specification of Letters Patent.

Patented J une 12, 1917.

Application filed July 22, 1914. Serial No. 852,367.

To all whom it may concern:

Be it known that I, ALLEN A. HORTON, a citizen of the United States,residin at Detroit, in the county of Wayne and tate of Michigan, haveinvented certain new and useful Improvements in Addin -Machines, ofwhich the following is a specification.

The object of the present invention is to equip an adding machine forautomatic operation in the making up of rogressive tables such forexample as used or rates of exchange or for readily ascertainin theremainders when the same quantity as been repeatedly deducted, or. asconstituting a pay-roll chart such as employedin factories I aim to andother business establishments. accomplish periodical addition of theconstant upon the registering wheels and the successive printing ofprogressing amounts all in a thoroughlyautomatic manner, that is to saywithout the necessity for any such manipulation as either the settingdown of amount keys through finger pressure each time the constant is tobe added or the depression of a special key or keys such as the familiartotal or subtotal keys when the progressive amount is to be printed. Incarrying out my invention in the manner here shown, I maintain pressureupon the selected keys during all of the operations but restrain thepressure-applying means except when an ensuing operation of the machineshould add the constant, and I provide for automatically settingsubtotaling devices for the printing of the progressing amounts. Ifurther provide for disabling the printing mechanism of the machineexcept when these progressing amounts are to be printed and Ifurthermore provide for disabling the linespacing mechanism except inthe same connection in order that a compact column of progressingamounts may be had.

I.l have chosen to illustrate my invention as adapted to the well-knownBurroughs adding and listing machine, the carrying and totalizingsystems of which are-such as to call for a blank stroke or operation asa pre liminary to the taking of a total, this on account of thenecessity for having certain members of the carrying mechanism inposition to serve as stops for the wheels at zero positions underbackward rotation. Therefore, in the present adaptation of my inventionI make provision for the intervention of a blank stroke or operationbetween an operation which adds the constant and an operation whichprints the progressive amount.

I am aware that it is not broadly new with me to run a list ofautomatically progressing numbers by practising subtotaling operations.Reference may be had in this connection to prior Patent No. 998,716,issued July 25, 1911, on the invention of George B. Putnam, which patentdiscloses an arran ement applied to the Burroughs machine or effectingthe automatic printing of consecutive numbers,-a single increment ofmovement being given to the lowest order wheel of a left-hand section ofaccumulating wheels in successive operations of the machine andsubtotals being printed which correspondingly increase by one. There ishere involved no selection and automatic repetition in depression ofamount kc s for the of totaling devices as is concerned in the Ycarrying out of my invention. I am further aware that the automaticsetting of totaling devices is not of itself broadly new. In thisconnection reference may be had to prior Patent No. 1,050,039, issuedJanuary 7 1913, upon the invention of Heber C. Peters and to Patent No.1,023,895, issued April 23, 1912, upon the invention of Jesse G.Vincent. Each of these patents shows an arrangement whereby totalingdevices may be automatically set by blank strokes of the operatinghandle of the machine and the Vincent patent shows a modification whichprovides for the automatic setting of subtotaling devices asdistinguished from grand totaling devices. However, neither of thesepatents discloses means for causing the registration of a predeterminedamount such as the constant of a progressive table to automaticallyintervene between totaling operations.

With the above stated and certain incidental objects in view which willlater become apparent, the invention consists in certain novelfeatures'of construction and combinations of elements, the essentialswhereof are recited in the appended claims and a preferred form ofembodiment of which is Referring to the accompanying drawings.- which.form part of this specification, Fig

ure 1 represents in left side elevation a Burroughs machine equippedwith mechanism for carrying out the present invention; Fig. 2 is a rightside elevation of the machine; Fig. 3 is a detail left side elevationshowing certain of the parts which appear in Fig. 2 differentlyconditioned; Fig. 4 is a top plan view of the front portion of themachine; Fig. 5 is a detail sectional elevation showing one of thekey-depressing attachments appearing in plan view in Fig. 4; Fig. 6 is across sectional front elevation .of the same device; Fig. 7 is a view onthe order of Fig. 1 showing relationship of parts at the conclusion ofan adding operation; Fig. 8 is a similar view illustrating therelationship of parts at the middle of a blank operation; Fig. 9 is asimilar View illustrating the relationship of parts at the conclusion ofa blank operation; Fig. 10 is another similar view illustrating thecondition at the end of the first half cycle of the total printingoperation; Fig. 11 is a similar view illustrating the effect of put tingdown a special key which converts the machine into a simple adding andlisting machine; Fig. 12 is a rear elevation of the machine with someportions thereof broken I out; Fig. 13 is a rear elevation of some ofthe parts shown in Fig. 12, illustrating a different relationshipthereof; Fig. 14 is a fragmentary right side elevation of the machineillustrating the special type carrier and disabling means thereforcontrolled by said special key; F i 15 is a corresponding left sideelevation ilustrating special type carrier setting means; Fig. 16 showsan example of work.

The machine proper requires no special description, in view of the factthat it appears in numerous prior patents and is extensively upon themarket, though certain familiar parts thereof will be referred to inorder that the cooperation of new parts supplied by my invention maybe'thoroughly understood. The amount keys 291 are arranged as usual toset stops for the rack 610, and they cooperate in the familiar mannerwith detent slide strips 214, the lat ter being released and restored asusual by the cross-rod 219 of a vibrating bail. Referring first to theattachments for selecting and applying pressure to amount keysrepresenting the constant (Figs. 4 to 6) I secure to the upper keyboardplate 213 a number of guide strips 2, one for each row of keys fromwhich selecting may be made for the constant,in the present instance thethree rows at the right. Each of these strips is slotted around the keystems and sufficiently spaced from the keyboard plate 213 to accommodatecertain portions of the pressure-applying attachment. This comprises anupright yoke 3 whose side pieces are widened at their lower ends andformed with flanges 3 to extend under the guide plate as clearlyillustrated in Fig. 6. The yoke is wide enough and high enough to passfreely over the keys when slid along the guide plate. There is securedto the cross-piece of the yoke an upstanding barrel 4 in which slidesthe stem 5 of a plunger whose head 5 is adapted to engage the key top todepress the key. A reduced portion of the stem extends through the headof the barrel and there is screwed to this stem a cap piece 6 whichsurrounds the barrel and serves as a handle or finger piece by which tomani ulate the pressure attachment. A coiled spring 7 surrounds thereduced portion of the stem within the barrel as clearly shown in Fig. 5and exerts a pressure constantly tending to thrust the plunger down uponthe key top.

Obviously with one of the above-described attachments mounted upon eachof the guide strips here shown selection can be made at will among theamount keys making up the three right-hand rows according to whatconstant may be called for. With the pressure-apply1ng attachments setover selected keys and the plungers released it is clear that these keyswill be set down the same as when in ordinary use of an adding machinefinger pressure is applied to keys, and an operation of the machine willresult in registering upon the regular wheels 920 an amountcorresponding with the numerals of the selected keys. It willfurthermore be seen that if the machine should be permitted to operatein the ordinary manner which involves advance and retreat of the bailcross-rod 219, the keys will be forcibly restored against the pressureof the spring 7 and then again depressed by said springs. It will beunderstood, however, from what was outlined in the beginning as to thecharacter of the present invention that for the purposes thereof thesaid springs 7 must be restrained while a blank operation of the machineis executed and also during the ensuing total printing operationthereof, though such springs may be released and in fact are released asthe total printing operation of the machine concludes, in order that anensuing operation of the machine may again register the constant.

The restraint of the springs 7 is effected through the medium of thebail cross-rod 219. Thus when the latter has been swung forward throughthe familiar instrumentalities including the wiper pawl 623 (Fig. 2), itis held forward in opposition to its retracting spring 219 by a lockingpiece or latch 8 pivoted upon a convenient shaft, towit, the shaft 500which carries the upper ribbon holder of the machine proper; Thiswardly-extending arm, and normally its raised portion in rear of itsacting shoulder cross-rod swings forward past the latch' .shoulder thelatter springs up vbehind said red as illustrated in Fig. 7 and blocksits rear movement. It will be recalled that Fig. 7 illustrates thecondition at the conclusion of an adding operation.

In the operation above described there is preparatory action of themechanism which in the next ensuing operation sets the totaling devices.The latter comprise the familiar total and subtotal keys 265 and 265surmounting upstanding branches of forwardly-extending arms of bellcranks 227 and 227 The latter is slightly modified for the purposes ofthe present invention by mounting a laterally-projecting stud 9 at itsforward end. A grappling device, presently to be pointed out, isadapted, in successive operations of the machine following the addingoperation to lay hold of this stud and pull down the subtotal key withthe same effect as the putting down of said key by finger pressure. Thegrappling device is in the form of a three-armed piece pivotally mountedat the forward end of a lever 12 pivoted upon the familiarshaft 600 ofthe machine. The upwardly-extending arm 13 of said grappling piece hasan inclined upper edge 13" constituting at its lower rear portion theback of a hook 13 and at its front portion merging into the rear side ofa short extension 13 of this arm of the grappling piece. Normally thesaid inclined edge 13 stands a distance below the stud 9 as shown inFig. 1 but as a result of an adding operation of the machine thegrappling device is moved up so that the said inclined edge isimmediately under the stud and the extension 13 is in front of the studas illustrated in Fig. 7. A spring 13 connecting the arm 13 of thegrappling piece with the lever 12 holds said arm rearward but in thefirst part of the blank operation of the machine the grappling device isforced farther upward and the said spring yields while the inclined edge13 cams past the stud 9, the hook 13 then springing ever the stud asillustrated in Fig. 8. Then attheconclusion of this operation when theregular interlocking devices between the total keys and the full strokesector 311 permit it, the grappling hook will pull down the subtotalkey. The power for the purpose is supplied by a relatively strong spring15 which connects the rear extremity of the lever 12 with the same framecross-rod to which the springs 8 and 219 are anchored. Obviously. whenthe machine is then again operated the effect will be the same as thatof depressing the subtotal key by hand and operating thev machine for anordinary subtotal printing performance.

Turning next to the mechanism whereby the step-by-step action of thelever 12 is produced for first moving the grappling hook up under thestud 9 and then taking it over that stud, the said lever is formed withan upward extension or branch 12 on its rear arm and this branchconstitutes a ratchet, its rear portion comprising two ratchet teeth12*. To eotiperate with this ratchet for the imparting of step-by-stepmovement to the lever 12 there is supplied a. pawl in the form of alaterally-turned end portion 16 of the rear branch of the bifurcatedupper part of a pitman 16 which re ciprocates in every operation of themachine. To this end the said pitman is coupled at its lower extremityto the familiar vibrating lever 813 of the machine proper and it isconnected to a frame-stud by a spring 16* which tends to engage the pawl16 with the ratchet. Normally as illustrated in Fig. 1 the pawl is overthe lower tooth of the ratchet ready to operate thereon and rock thelever 12 when the pitman is lowered during the first half cycle of anoperation of the machine. In the last half cycle of such operation thepitman is lifted and the pawl wipes upwardly past the upper tooth of theratchet and assumes a position above the same as illustrated in Fig. 7ready to act upon this uppertooth and further rock the lever 12 in thefirst half cycle of the next ensuing operation of the machine asillustrated in Fig. 8.

The lever 12 is detained in the intermediate position by the co-actionof the grappling piece as a catch or detent with a fix- 13 and there issecured to the right side frame piece of the machine a small bracket 17having a laterally-turned lower portion 17 supplying a shoulder overwhich the shoulder 13 will engage under actuation of the spring 13. Whenthe lever 12 is further rocked the cumming effect between the inclinededge 13 and the stud 9 swings the grappling piece upon its pivot to suchextent as to throw the shoulder 13 out of alinement with the bracketshoulder 17 a and when the hook 13 passes the stud 9 the engagement ofthe latter with the rear edge of the arm 13 below the hook prevents saidarm swinging back far enough to re-aline the shoulder 13 with theshoulder 17. Consequently when the subtotal key is released by thebefore-mentioned familiarinterlocking devices the spring 15 is permittedto rock stroke under actuation of the spring 15 and in order that thepawl 16 may re-assume a position for eventual coiiperation again withthe lower tooth of the ratchet, it is necessary that said pawl bedisplaced from over the upper tooth. This is provided for by having thedownwardly-extending arm of the bell crank 227 engage the front edge ofthe forward branch 16 of the pitman. Thus as the subtotal key bell cranklever 227 is rocked by the grappling device its said depending arm willact against the pitman and throw its upper end rearward to the positionillustrated in Fig. 9 thereby taking the pawl 16 from over the upperratchet tooth which then moves above said pawl so that at the conclusionof the next operation of the machine when the subtotal key is releasedand rises under actuation of its own spring 227 said pawlgnay move inover the lower tooth of thefatchet.

Referring next to the matter of release of the subtotal key from thegrappling device during the subtotaling operation, said device for thispurpose has a rearwardly-extending arm 13 which overlies a stud 18 atthe forward end of a lever 19 pivoted upon the depending arm of thesubtotal key bell crank lever and having a rearwardly-extending armunderlying a stud 16 on the rear branch of the upper part of the pitman16. When the subtotal key lever is rocked by the grappling device thislever 19 is swung back with the depending arm of the bell crank 227' sothat it accompanies the upper end of the pitman 16 when the latter isthrown rearward as above described by said arm of the bell crank.Consequently the extremity of the rear arm of said lever 19 remainsunder the stud 16 and as the pitman lowers in the first half cycle ofthe subtotaling operation said stud rocks the lever 19 and the lattersstud 18 operates upon the arm 13 of the grappling device and disengagesthe hook of the latter from the stud 9. The grappling hook pulls thesubtotal key down far enough to permit a slight rise of the key beforeit is released by the interlocking devices before mentioned (Fig.10),--this in order to prevent reengagement of the hook of the grapplingdevice over the stud 9. The result is that as the last half of theoperation begins (following the disengagement of the grappling hook fromthe said stud during the first half of the operation) the end of thehook will strike against the stud 9. Then at the end of the operationthe interlocking devices release the subtotal key and it rises to itsnormal position.

Referring next to the release of the bail 219 and consequent removal ofrestraint of springs 7, so that they may again depress the underlyingkeys and provide for registering the constant in the operation of themachine next ensuing after the total printmg operation, this release iseffected through the medium of the totaling devices. Numeral 226designates the familiar link which connects the grand total key bellcrank lever 227 with the releasing bail. For the purposes of the releasenow under discussion said link is formed with a rearward and upwardextension 226 and the latch 8 is formed with a downwardlyextendingbranch 8 designed to be acted upon by a stud 226 carried by saidextension 226'. Normally the stud 226 stands forward of the latch arm 8as shown in Fig. 1 so as to permit the latch to swing up into engagementwith the release bail cross-rod 219 as 30 shown in Fig. 7. WVhen thesubtotal key is pulled down the total key is likewise rocked through themedium of the familiar link 216, and the link 226 is correspondinglythrust rearward. This causes the stud 226 to act 35 upon the forwardedge of the latch arm and disengage the latch from the bail cross-rod219, as illustrated in Fig. 9, whereupon when the total key restores,the cross rod retreats itnd the springs 17 depress the underlying reys.

Referring next to the matter of preventing the printing mechanism fromoperating except when the progressive numbers are to be printed, Iemploy a locking comb 2O 1 similar to that designated M in Patent No.1,016,276, issued February 6, 1912, upon the invention of William J.Kilpatrick, said comb adapted to engage behind shoulders of the printinghammers 715 as in said patent. In the present instance, the comb iscoupled to the long arm of a lever 21, which is pivoted intermediate itsends upon a stud carried by the left side piece of the fixed frame inwhich the printing hammers are mounted. The weight of this long armcoupled with the weight of the plate itself effects a normal engagementof the plate with said shoulders so that the hammers are blocked. Anupturned forward arm 21' of said lever extends in front of a stud 22 ona depending arm 22 of a three-armed rocking piece j ournaled on theshaft 600 and having an u standing branch or arm 22 adapted to actedupon by a stud 226 in an upstanding branch of the link 226. Thus, whenthe total keys are operated in the manner above described this stud actsagainst the arm 22 rocking it rearward and rocking the depending arm 22forward whereby the long arm 21 of the aforesaid lever is raised and thecomb plate 20 swung upward out of line with the hammer shoulders. Thehammers are thus unblocked so as to be ready for printing theprogressing total or subtotal in the next ensuing operation. When thatis over the total keys have returned to normal and consequently thehammers again become blocked. The hammers remain blocked during theadding of the constant and also during the blank operation though i asto the latter this would not be necessary of the machine since therewould be no release of hammers in such an operation, according to thelaw proper.

Referring next to the matter of disabling the line-spacing mechanism inorder that the progressing amounts may be listed in a compact column,the aforesaid three-armed structure serves in this connection alsothrough the medium of its rearwardly-extending branch or arm 22. Thelatter is connected by a link 25 with the forward arm of a lever 26whose rear arm controls a linespace couplin device of familiarcharacter. Referring to the lever 26 engages the bifurcation of an arm27 secured to a short rock shaft 28 journaled in the back panel of themachine. A radius link 29 is fastened to said rock shaft and connectedby a horizontal link 30 with a similar link 31. A stud 32 on saidhorizontal link engages a coupler dog 40 which is part of theline-spacing mechanism. Thus, this dog is pivoted to avertically-reciprocating shde 41 and is adapted to engage under a flangeor lip 42 of another vertically-reciprocatin sllde 43. The two slidesare asusual s otted and mounted upon the back panel of the machine andprovided at their upper ends with jaws to embrace the line space bail. Aspring 26 normally holds down the rear arm of the lever 26 with theresult that the coupler dog is held away from the lip or flange 42 inopposition to the spring 40 applied to said dog. Consequently no line.spacing occurs in either the operation which adds the constant or thefollowing blank operation. However, in the totaling operation linespacing does ocout by reason of the fact that the rocking of thethree-armed piece (already explained as being an incident to the settingof the total device) involves downward movement of the branch 22 andconsequently upward movement of the rear arm of the lever 26 and releaseof the coupler dog.

The above-described coupling and uncoupling arrangement per se for thelinespacing mechanism is new old and well- -known being disclosed inseveral prior patents e. 9. Patent No. 1,084,591 issued January 13,1914, on the invention of Russell E. Benner.

In the interest of making the machine available to the user for a greatvariety of purposes, it is desirable to provide for converting it atwill into a simple adding and listing machine. To this end I supply aspecial key whose depression will disable all of the above-describeddevices for effecting the automatic production of the progressive ig. 12the said rear arm of table, except the attachments for putting pressureupon the keys and these can be readily removed by sliding them ofi theends of their guide plates.

The said special key is designated 50 and is arranged at the u perleft-hand corner of the keyboard to sli e through slots in the plates213 and 212 and also have a slight rocking movement to enable its notchto be engaged with the upper keyboard plate when the key is depressed sothat it will not be necessary to maintain pressure upon this key. Thestem of the latter is pivoted to the forwardly-extending arm 51 of athree-armed rocker piece and such stem preferably has a forward branch50" connected by a spring 52 with a rock shaft 200 so that the latchingdown of the key will take place automatically. The said threearmedrocker piece is journaled upon a frame cross-rod 201 and has 8.depending arm 51 with a stud 51 to coact with .the branch 16 of thepitman 16, and a rearwardly-extending arm 51 with a stud 51 to coactwith the depending arm 8 of. the

latch 8. The pivot stud 51 which connects the forwardly-extending arm 51of the rocker piece with the stem of the key 50, projects inwardly farenough to act upon a cam finger 22 which is an extension of the arm orbranch 22 of the other three-armed rocker piece hereinbefore described.

When the key 50 is put down the stud 51 acts upon said cam finger androcks the lastmentioned piece sufficiently to cause the lever 21 to liftthe hammer-blocking comb plate 20 as shown in Fig. 11. This action alsoresults in operating the lever 26 to permit coupling up of the linespace devices. The rocking of the other three-armed piece by thedepression of said key causes its stud 51 to act against the pitmanbranch 16 and swing the pawl 16 rearwardly away from the ratchet teeth12". At the same time the stud 51 is swung up in front of the arm 8 ofthe latch 8 so as to prevent the latter from engaging the bail cross-rod219.

The aforesaid stud 51 serves another purpose, namely, that of preventingan inopportune use of the key 50, as 'for instance immediately followingan operation of the machine for adding a constant. Thus as illustratedin Fig. 7 the swinging of the latch *8 into engagement with the releasebail crossr0d219 results in a slightly widened end portion or foot ofthe latch arm 8 moving over said stud and thereby blockin the key. Itwill be understood that the be ore-mentioned spring 52 besides servingthe function ofautomatically latching down the key also serves torestore said key to normal position when it is unlatched. The upwardmovement of the key and corresponding return swing of the three-armedrocker piece are conveniently limited by abutment of the square side ofthe stud 51? agalnst the stem 60 of the .familiarelimination key, andsald stem is in the present instance formed with a lug 61 (Fig. 1) toengage over said stud for the urpose of preventing depression of theehmination key except when the socalled normal key 50 is in action.

The machine is equipped w1th a special type carrier 611 (Fig. 14) offamiliar character, for the purpose of pr1nt1ng s1gns to distinguishtotals, subtotals and ehmmated Or non-added items from added ltems, butas no such special printing would be desirable in connection with aprogressive table, I provide for disabling this special type carrierexce t when the said normal key is down. T us the before-mentioned stud51 extends under an arm 7 0 of a yoke 71 which is journaled upon therelease bail rock shaft and at the right-hand side of the machine (Fig.14) has a depending arm 72 wlt-h a widened lower end or foot 72 forcooperation with a stud 611" of the special type carrier. As illustratedby the full lines in Fig. 14 said arm 72 is rearward when the specialkey 50 is down and consequently does not interfere with the action ofthe special type carrier. However, when the key is up as shown by dottedlines in F 1g. 14 said arm 72 assumes a forward position under actuationof a spring 74 applied to the yoke 71, and in such position stands overthe said stud 611 thus blocking the speclal type carrier.

When the key 50 is down the differential setting of the special typecarrier is brought about in a familiar manner. Thus a swinging arm 80,having a notched foot 81, cooperates with the stud 611 of the specialtype carrier, the extent of movement of the latter bein regulated by thesetting of the arm 80 um er control of the total, subtotal andelimination keys. Thus said arm 80 is secured to the rock shaft 200which at the left-hand side of the machine has a depending arm 82 (Fig.15) which cooperates with a stud 226 of the total key link 226 and isequipped with studs 82 and 82 to cooperate respectively with thesubtotal key bell crank lever 227 a and a cam 60 on the elimination keystem. A spring 82 normally holds the arm 82 forward.

Referring next to the manner of driving the machine, it is here shownarranged for either hand or power operation. When motor driven it isdesirable that the user be relieved of the necessity for maintaininghand pressure upon the starting bar and I have so modified the familiarcontrol devices for the motor as to provide for this. It will beunnecessary to describe in detail the control devices proper since thesame are fully disclosed in prior patents and in use on numerousmachines on the market.

Reference may be had to Patent No. 866,750 issued September 24, 1907, onthe invention of Jesse G. Vincent which illustrates this standardcontrol e( uipment of a Burrou hs adding machine. s fully explained in tat patent and as well understood by those skilled in the art the machinemay be caused to run continuously, or to automatically execute operationafter operation by simply maintaining hand pressure upon the startingbar 90 (Fig. 2),this by reason of the fact that the spring 92 is keptunder tension and consequently when the roller stud 311 on the fullstroke sector has forced down the bar 93 and thrown the starting studback into the path of the arm of the clutchcontrolling device (as fullyexplained in the said V1ncent patent) and the said full stroke sectorthen executes its return movement the said bar 93 will rise and continueto follow the stud 311" so as to again remove the starting stud from thepath of the said arm of the clutch-controlling device. I provide forthis same automatic succession in operations without necessitatingcontinued depression of the bar 90. I ta (e advantage of the excessivedownward movement imparted to the bar 93 by the stud 311 and consequentexcessive tensioning of the spring 92, to effect automatic release ofthe clutch-operating means by reason of holding said spring under suchexcessive tensioning until the stud 311 has swung up considerably awayfrom the abutment branch 93 of the bar and then releasing the latter sothat it will be thrown upward with such momentum as not to be checked bythe encounter of the bottom of its slot 93 with the stud 90 of thestarting bar lever 90". I have found in practice that this action can berelied upon to reset the clutch and cause successive operations of themachine. to take place automatically, the power of the spring 92 beingsuch as to overcome the spring 95 which as usual connects the startingbar lever 90" with the other starting bar lever 90.

The means here shown for carrying out i the above-described modifiedaction of the motor control devices comprise a stud 93 fastened in theabutment branch 93 of the bar 93, and a latch lever 96 notched at itslower end to engage the said stud and formed higher up with acam lug 96"to cooperate with the roller stud 311. The latch lever is pivoted upon aframe stud 97 and a spring 98 is applied to its upper arm so as toenforce engagement of the cam lug 96' with the roller stud 311 and tendto engage the notched lower end of the lever 96 with the stud 93.Normally the roller stud 311 holds the latch lever off throughengagement with the high part of the cam In as Shown in Fig. 2. However,when the ro ler stud 311 swings down upon inauguration of a series ofoperations by depression of the starting bar 90, the latch-lever Swingsrearward and when the bar 93' has been forced down by the roller studabout to the limit of its movement, the said lever becomes engaged withthe stud 93 as shown in Fig. 3. [his engagement keeps the spring 92under considerab e tension as the full stroke sector 311 makes itsreturn stroke and until at the close of such return stroke the rollerstud 311' in riding up the cam lug 96" disen ages the latch lever 96from the stud 93. ereupon the bar 93 springs upward with considerableforce and the result above explained -comes about so that the inauguraloperation of the machine is immediately followed by another and so onindefinitely.

Of course this equipment for effecting successive operations of themachine as motor driven, without maintaining ressure upon the startingbar 90, should be isabled when the machine is in use in the ordinary wayas an adding and listing machine. Therefore, I provide another specialkey 100 (Fig. 2) whose stem is pivotally connected to a bell crank lever101, the latter being connected to a link 102 which is slotted at itsforward end to embrace a stud 96 on the upper arm of. the latch lever96. When the key is up as shown in Fig. 2 the slot permits the latchlever to erform its function in the manner already escribed. Howeverwhen the ke is put down the front end of the slot o the link is broughtup to the stud 96 and the latch lever is blocked. The stem of the key100 is notched in the familiar manner to provide for latching it down.

The above-mentioned Vincent Patent No. 866,750 also discloses theinterlocking devices hereinbefore referred to as commonly used betweenthe totaling devices of these machines and the prime mover thereof.Similar interlocking devices appear in Fig. 2, the same comprising arock shaft 1400 operatively connected with the total key, an

arm 1400 secured to said rock shaft, a' roller stud 1400 upon said arm,and a flange or rib 311 upon the full stroke sector. It will beunderstood that these devices serve to prevent use of the total keysafter an operation of the machine is started and until such operation 1sover, and vice versa, prevent an operation of the machine while the keystops, with provisions for restraining the aforesaid key-depressingmeans during the totaling 0 ration.

2. In a mac ine of the class described the combination of registeringwheels; reciprocating type-carrying actuators therefor; means forengaging and disengaging the wheels and actuators; keys supplying sto sto measure movements of the latter; settab e means for repeatedlydepressing keys; means for keeping the wheels and actuators engagedduring movement of the latter in both directions as controlled in extentby backward rotation of wheels to zero for subtotaling purposes; a primemover; and means for setting the last-mentioned means thereby inautomatic succession to operation of the wheel actuators under controlof the key stops, with provisions for restraining the aforesaidkey-depressing means during the totaling operation.

3. In a machine of the class described the combination of registeringwheels; reciprocating type-carrymg actuators therefor; carryingmechanism including trip pawls serving also as zero stops; means forengaging and disengaging the wheels and actuators; keys supplying stopsto measure movements of the latter; settable means for repeatedlydepressing keys; means for keeping the wheels and actuators engagedduring movement of the latter in both directions as controlled in extentby backward rotation of wheels to zero for subtotaling purposes; a primemover; and means for setting the last-mentioned means in an operation ofthe prime mover immediately succeeding one wherein the actuators areunder control of the key stops and restraining the key-depressing meansduring such operation and during the next operation of the prime moverwhich effects the totaling. 3

4. In a machine of the class described the combination of registeringwheels; typecarrying actuators therefor; keys supplying stops tovariously measure movements of actuators; settable means for repeatedlydepressing keys; means for positioning the actuators under control ofthe wheels for the printing of a total; printing mechanism; a primemover; and means for setting the lastmentioned means thereby inautomatic succession to operation of the wheel actuators under controlof the key stops, with provisions for restraining the aforesaidkey-depressing means during the totaling operation and for automaticallydisabling the ing the whee tuators; keys supplying stops to measuremovements of the latter; settable means for repeatedly depressing keys;means forkeeping the w eels and actuators engaged during movement of thelatter in both directions as controlled in extent by backward rotationof wheels to zero for subtotaling purposes; a prime mover; means forsetting the lastmentioned means in an operation of the prime moverimmediately succeeding one wherein the actuators are under control ofthe key stops and restraining the key-depressing means during suchoperation and during the next operation of the rime mover which effectsthe totaling; printing mechanism; and means for automatically disablingit during the first of said three operations of the prime mover andenabling said mechanism for the third of said operations.

6. In a machine of the class described the combination of registeringwheels; typecarrying actuators therefor; keys supplying stops tovariously measure movements of actuators; settable means for repeatedlydepressing keys; means for positioning the actuators under control ofthe wheels for the printing of a total; printing mechanism; a primemover; means for setting the last-mentioned means thereby in automaticsuccession to operation of the wheel actuators under control of the keystops, with provisions for restraining,the aforesaid key-de ressingmeans during the totaling operation and for automatically disabling theprinting mechanism in a preceding operation; line-s acing mechanism; andmeans for disabling it in all but one of said operations of the primemover.

7. In a machine of the class described the combination of registeringwheels; reciprocating type-carrying actuators therefor; carryingmechanism including tr1p pawls serving also as zero stops; means forengaging and disengaging the wheels and actuators; keys supplying stopsto measure movements of the latter; settable means for repeatedlydepressing keys; means for keeps and actuators engaged during movementof the latter in both directions as controlled in extent by backwardrotation of wheels to zero for subtotaling purposes; a prime mover;means for setting the last-mentioned means in an operation of the primemover immediately succeeding one wherein the actuators are under controlof the key stops and restraining the key depressing means during suchoperation and during the next operation of the prime mover which eflectsthe totaling; printing mechanism; means for automatically disabling itduring the first of said three operations of the prime mover andenabling said mechanism for the third of said operations; line-spacingmechanism; and means for distabling it in all but one of said threeoperaions.

8. In a machine of the class described the combination of re isteringwheels; typecarrying actuators t erefor; keys supplym stops to variouslymeasure movements 0 actuators; settable means for repeatedly depressingkeys; means for releasing and restorin depressed keys; means forpositioning t e actuators under control of the wheels for the printingof a total; a rime mover; means for setting the last-mentioned meansthereby in automatic successions to operation of the wheel actuatorsunder control of the key stops, with provisions for locklng the keyreleasing and restoring means in operated position and therebyrestraining the aforesaid key-depreming means durinIg the totalingoperation.

9. n a machine of the class desrcibed the combination of registeringwheels; type carrymg actuators therefor; keys supplying stops tovariously measure movements of actuators; settable means for repeatedlydepressing keys; a key releasing and restormg bail; means forpositioning the actuators under control of the wheels for the printingof a total; a prime mover; means for setting the last-mentioned meansthereby in automatic succession to operation of the wheel actuatorsunder control of the key stops; a spring-actuated latch for thekey-releasing bail; and means for displac ing the latch by thelast-mentioned means.

10. In a machine of the class described the combination of registeringwheels; reciprocating type-carrying actuators therefor; means forengaging and disengaging the wheels and actuators; keys supplying sto sto measure movements of the latter; settab le means for repeatedlydepressing keys; means for keeping the wheels and actuators engagedduring movement of the latter in both directions as controlled in extentby backward rotation of wheels to zero for subtotaling purposes; a primemover; a reciprocating element operatively connected with the rlmemover; and devices actuated stepy-step thereby for setting thelastspecified means.

11. In a machine of the class described the combination of registeringwheels; reciprocating type-carrylng actuators therefor; means forengaging and disengaging the wheels and actuators; keys sup lying stopsto measure movements of the atter; settable means for repeatedlydepressing keys; means for keeping the wheels and actuators engagedduring movement of the latter in both directions as controlled in extentbv backward rotation of wheels to zero for subtotaling purposes; a primemover; a reciprocating element operatively connected with the primemover; and devices actuated step-by-step thereby for setting thelastspecified means, the latter adapted to displace the reciprocatingelement and said element then operating to disconnect the said devicesfrom the totaling means.

12. In a machine of the class described the combination of registeringwheels; reciprocating type-carrying actuators therefor; carryingmechanism including trip pawls serving also as zero stops; means forengaging and disengaging thewheels and actuators; keys supplying stopsto-measure movements of the latter; settable means for repeatedlydepressing keys; means for setting the last-mentioned means in anoperation of the prime mover immediately succeeding one wherein theactuators are under control of the key stops and restraining thekey-depressing means during such operation and during the next operationof, the prime mover which effects the totaling; a prime mover; areciprocating element operatively connected with the prime mover; anddevices preliminarily actuated in the first of the above specified threeoperations of the prime mover and finally actuated in the second of saidoperations for setting the last specified means to bring about atotaling effect in the third of said operations.

13. In a machine of the class described the combination of registeringwheels; reciprocating type-carrying actuators therefor; carryingmechanism including trip pawls serving also as Zero stops; means forengaging and disengaging the wheels and actuators; keys supplying stopsto measure movements of the latter; settable means for repeatedlydepressing keys; means for keeping the wheels and actuators engagedduring movement of the latter in both directions as controlled in extentby backward rotation of wheels to zero for subtotaling purposes; a primemover; a pawl operatively connected with the prime mover; aspring-actuated ratchet lever operated upon by said pawl; and agrappling device carried by said lever and adapted upon a secondactuation thereof by the pawl, to lay hold of and set the last-specifiedmeans.

'11. In a machine of the class described the combination of registeringwheels reciprocating type-carrying actuators therefor; carryingmechanism including trip pawls serving also as zero stops; means forengaging and disengaging the wheels and actuators; keys supplying stopsto measure movements of the latter; settable means for repeatedlydepressing keys; means for keeping the wheels and actuators engagedduring movement of the latter in both directions as controlled in extentby backward rotation of wheels to zero for subtotaling purposes; a primemover; a pivoted springheld reciprocating pawl operatively connectedwith the prime mover; a springactuated ratchet lever operated upon bysaid pawl; and a grappling device carried by said lever and adapted tolay hold of and set the last specified means, the latter thereupondisengaging the pawl from the ratchet lever.

15. In a machine of the class described the combination of registeringwheels; reciprocating type-carrying actuators therefor; carryingmechanism including trip pawls serving also as zero stops; means forengaging and disengaging the wheels and actuators; keys supplying stopsto measure movements of the latter; settable means for repeatedlydepressing keys; means for keeping the wheels and actuators engagedduring movement of the latter in both directions as controlled in extentby backward rotation of wheels to zero for subtotaling purposes; a primemover; a pivoted springheld reciprocating pawl operatively connectedwith the prime mover; a springactuated ratchet lever operated upon bysaid pawl; a grappling device carried by said lever and adapted to layhold of and set the last specified means, the latter thereupondisengaging the pawl from the ratchet lever; and a trip for thegrappling device operated by the pawl when so disengaged.

16. In a machine of the class described the combination of registeringwheels; reciprocating type-carrying actuators therefor; carryingmechanism including trip pawls serving also as zero stops; means forengaging and disengaging the wheels and actuators; keys supplying stopsto measure movements of the latter; settable means for repeatedlydepressing keys; means for keeping the wheels and actuators engagedduring movement of the latter in both directions as controlled in extentby backward rotation of wheels to zero for subtotaling purposes; a primemover; a pivoted spring-held reciprocating pawl operatively connectedwith the prime mover; a spring-actuated ratchet lever operated upon bysaid pawl; a p

grappling device in the form of a hook pivoted on said lever andspring-held and having a catch-arm; and a. fixed catch piece for saidarm to engage whereby the ratchet lever and the grappling device aremaintained in an intermediate position in opposition to the lever-springpending a second actuation of the lever by the pawl.

17. In a machine of the class described the combination of registeringwheels; reciprocating type-carrying actuators therefor; carryingmechanism including trip pawls serving also as zero stops; means forengaging and disengaging the wheels and actuators; keys supplying stopsto measure movements of the latter; settable means for repeatedlydepressing keys; means for keeping the wheels and actuators engagedduring movement of the latter in both directions as controlled in extentby backward rota tion of wheels to zero for subtotaling purposes; aprime mover; a pivoted spring-held reciprocating pawl operativelyconnected with the prime mover; a spring-actuated ratchet lever operatedupon by said pawl; a grappling device in the form of a hook ivoted onsaid lever and spring-held and aving a catch-arm; and a fixed catchpiece for sald arm to engage whereby the ratchet lever and the grappling-device are maintained in an intermediate position in opposition to thelever-spring pending a second actuation of the lever by the pawl, withprovisions for taking the am out of alinement with the catch iece insuch actuation substantially as an for the purpose described.

18. In a machine of the class described the combination of depressiblekeys, attachments settable thereat in fixed relation thereto and havingmeans of a yieldin nature constantly tending to depress the eys; andautomatic key-restoring means acting intermittently in opposition tosaid yielding means.

19. In a machne of the class described the combination of depressiblekeys, attachments settable thereat in fixed relation thereto and havingspring-pressed Elungers constantly tending to depress the eys; andautomatic key-restoring means acting intermittently in opposition tosaid yielding means.

20. In a machine of the class described the combination of depressiblekeys, attachments settable thereat in fixed relation thereto and havingspring-pressed plungers 'constantly tending to depress the keys; andautomatic. key-restoring means acting intermittently in opposition tosaid yielding means; together with manipulative means for withdrawingthe plungers.

21. In a machine of the class described the combination'of a series ofdepressible keys; a fixed guide extending along the same; a holderslidable on said guide; a spring-actuated plunger mounted in said holderand adapted to exert constant pressure upon a selected key; and meansfor retracting said plunger.

ALLEN A. HORTON.

Witnesses:

R. W. FAIRCHILD, R. S. MIELERT.

